Re: [HTCondor-users] HTCondor/cgroups: limiting CPUs/pinning processes to CPUs with hyperthreaded CPUs

[Thomas Hartmann <thomas.hartmann@xxxxxxx>]

Hi Michael,

yes - I had some hands on with cgroups on Univa SGE and they really got
useful.
Actually, my original question arose, when I noticed a user complaining
in another mailing list, that his jobs got killed at another site -
rightly, I guess, since he was running a 'make -j32' while requesting
one core...

I really am looking forward to let cgrougs take care of such human forms
as your Matlab cases and do not have to worry much about
thread/memory/... bombs anymore ;)

Cheers and thanks,
  Thomas

On 2016-02-04 17:01, Michael V Pelletier wrote:
> From: Thomas Hartmann <thomas.hartmann@xxxxxxx>
> Date: 02/04/2016 10:46 AM
>  
>> many thanks for the info!
>> I have not considered CPU time sharing/known about its implementation in
>> HTCondor/cgroups. Using cpu shares should get a much better resource
>> utilization than pinning ;)
> 
> I was a very early adopter of cgroups right from 8.0 back in 2013, and
> love 'em. I suspect you will too. At least a couple of the cgroup bug
> tickets
> originated with me, both at CHTC and Red Hat. ;D
> 
> They're really an essential element of exec node self-defense, and
> made a big difference in the uptime numbers back when we were still working
> on disciplining some of our misbehaving jobs.
> 
>         -Michael Pelletier.
> 
> 
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